Stenotrophomonas maltophilia isolated from the airways of animals with chronic respiratory disease.

The research article discusses the isolation of the bacterium Stenotrophomonas maltophilia from the airways of animals with chronic respiratory conditions.

Understanding Stenotrophomonas maltophilia

• The bacterium Stenotrophomonas maltophilia (S. maltophilia) is a non-fermentative organism that has natural resistance to a range of commonly used antibiotics.
• It is often found in humans suffering from chronic respiratory diseases like cystic fibrosis or chronic obstructive pulmonary disease.
• In the realm of veterinary medicine, S. maltophilia is generally considered a coloniser, an organism that proliferates in an environment without necessarily causing disease.

Stenotrophomonas maltophilia in Animals with Chronic Respiratory Disease

• In this report, the researchers identified seven strains of S. maltophilia in animals, five of which were located in three horses, a dog, and a cat, all of whom had chronic respiratory disease.
• The research highlights the case of the dog, whose S. maltophilia strain showed resistance to the antibiotic trimethoprim/sulphamethoxazole, which was confirmed by the detection of the sul 1 gene, known for its resistance properties.

Hospital-acquired Colonisation

• In their analysis using pulsed field gel electrophoresis (a technique used to separate large DNA molecules by applying an electric field that causes the DNA to move), the researchers found identical strains of S. maltophilia in two horses.
• These horses were kept in the same clinic but were admitted two years apart, suggesting the bacterium was hospital-acquired.
• This finding contradicts the assumption that the S. maltophilia was involved in the pre-existing chronic disease, instead pointing to the possibility of hospitable-acquired colonisation or infection.